Opening and closing the shaft cover - Internal hydraulic cordless screwdriver unit
the cover now opens for as long
inadvertent activation of the cover. Screw the locks in again correctly. This is important to ensure
when the shaft cover is in the closed position, the lid can be opened or raised easily e.g. using a
Chapter 06: Using the shaft cover
Attention!
- When opening or closing the cover, please first ensure that no other
persons are located in the immediate hazard area.
1. First release the locks using the operator key, as described on page 11.
Then loosen the cover screws, using the hydraulic unit.
2. Opening: Covers with internal hydraulics are supplied with a special operator key.
This has a long size 12 socket at one end. This end of the key can be used to operate
the outlet valve on the hydraulic unit. First check whether the valve is closed by placing
the operator key onto the valve’s mounting cone and turning it carefully
in a clockwise
direction. (If the valve is not closed, the pump simply feeds the oil back into the reservoir
and the lid does not open.)
The pump is powered by a cordless screwdriver and a four-
sided 1/4” extender from a
standard socket wrench set. For this, the cordless screwdriver must be set to clockwise
(rotating in a clockwise direction) and placed onto the mounting cone of the pump. The
different gear settings on the cordless screwdriver then influence the opening speed of
the lid. Shortly before the end, before the lid is fully open, the cordless screwdriver
should be operated at a slower speed.
4. Closing: When the operator key is placed onto the mounting cone of the outlet valve
and turned in an anti-clockwise direction, the valve opens and the shaft cover lid closes
under its own weight. Please operate the outlet valve carefully to familiarise yourself with
this procedure and thus with the closing speed of the lid.
The lid latch must be released before the cover can be closed.
5. After closing the lid, please screw the locks in again correctly.
This is important to ensure that the seal is pressed firmly against the frame and a
watertight surface water seal is formed.
Note:
The hydraulic unit is fitted with an internal pressure limiter and is pre-set to a system
pressure of max. 180 bar. This maximum pressure must not be changed or increased
under any circumstances, otherwise the hydraulic components may be damaged.
Through the possible use of additional gas-pressurised springs, the shaft covers are
designed in such a way that the cover can be opened or closed using this system
pressure. The hydraulic hoses are designed by the manufacturer for a max. pressure of
350 bar. Despite this, it is important to check the hoses for possible damage, cracks,
porous points etc. every time the cover is operated or opened. Defective hoses or other
components are to be replaced immediately in order to ensure the safe use of the
system.
Emergency opening:
If the internal hydraulic unit should fail to operate correctly, for emergency opening from
the outside it is possible to connect a hand-pump (#9559731) or a portable hydraulic
unit with a cordless screwdriver actuator (#9559881) via a quick-release unit.
Status: 10-2021
Page 14 of 16
